Jack



Nov. zo, 192s. 1,692,444.

' M; A. HIRSCHL JACK Filed Aug. 5, 1927 2 Sheets-Sheet 1 m w Rl w y ff/ /f Pate-med Nov. 20.19.28. l

UNITED` STATES PATENT OFFICE.

mCUS A. HIRSCHL, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL-STANDARD COMPANY, OF NILES, MICHIGAN, A CORPORATION OF IYIIGIHIG'AIN'...V

JACK.

Application led August This invention relates to improvements'in jacks, and more especially to a lifting jack such as is commonly used in connection with the repairing of tires on automobiles. My im- 5 proved j ack is of the ty `having a standard and a lifting member te escoped therein.

My improved jack is compact when collapsed, has a considerable lift when fully extended and is easy to operate, strong and du- 1n rable.

. In that form of device embodying the features of 'my invention shown in t-he accompanying drawings, Figure 1 is ai vertical sectional view, Fig. 2 is a view taken as indicated 15 by the line 2 of Fig. 1, Fig. 3 is a View taken as indicated by the line 3 of Fig. l, Fig. 4 is a vertical sectional view, taken as indicated by the line L1r-4, of Fig. 5, showing a modified form, Fig. 5 is a view taken as indicated by 2o the line 5 of Fig. 4, and Fig. 6 isa view taken as indicated by the line 6' of Fig. 4.

One of the particular features of my invention is the provision of a jack with a hollow standard and having an inner lifting member, and one or moreadditional ball retaining members. The bore in the standard and in theI ball retaining members is constant in size at all times, whether the liftinmmember be elevated or not. Accordingly, there may be utilized for operating the jack a row of balls of uniform size lying in the bore. Means l are also provided for forcing said balls longitudinal in saidbore to elevate the telescoping li ting member of the jack. This telescoping lifting member may be elevated completely out of the standard and when so elevated, one or more ball retaining members serve to hold the row of balls below it in vstraight alignment.

' As shown in the drawings, 10 indicates a cylindrical hollow standard mounted on the base 10".

The base is provided with an arm-like ex-` tension 6 having a way therein comp-rising a central cylindrical bore-like portion 7. This way is curved at its inner end and opens upwardly into the lower end of the standard.

In the form shown in Figs. 1, 2 and 3, I have provided a lifting member and one ball retaining member. The lifting member consists .of the solid bar 13 carrying on its upper end the shoe or support 14 to engage the axle o acar. i

The ball retaining member comprises the v 5, 1927. Serial No. 210,859.

collar 11 with the four downwardly projectin bars 12, the inner surfaces of which li'e 4ad]acent the outer surface of t-he bar 13. The bars 12 are adapted for vertical sliding movement in the holes 12a in the standard 10, such holes being arranged just outside of the central bore or hole 10b in the standard, so that the inner faces or surfaces ofthe bars 12 will be substantially in cont-act with the outer face o-r surface of the lifting member 13'when the jack is collapsed (see Fig. 2). The upper end of the standard 10 is provided with an annular enlargement 10c adapted to accommodate the collar 11 when the same is in its lowermost position. In speaking of the ball retaining member, I include the collar 11 with the projecting bars y12 having their upper ends threaded thereinto. It is obvious that this ball retaining member may be made of one piece if desired. The collar 11 is 1 rovided with a centrally arranged hole 11 adjapted to receive the bar 13 of the inner lifting member.

The lifting member is adapted to be elei vated by a row of balls l5 lying in the bore 7 and adapted to be forced inwardly by a screw 16.

18 indicates pins projecting through thecollar 11 yhaving their inner ends lying in slots 17 in the lifting member, the lower ends of said slots terminating in shoulders 17.y

19 indicates pins in the lower ends of the bar 12 pressed outwardly bA means of the springs 19, the outer ends o said pins lying .in the grooves 20 in the standard 10.

In the operation of the device, the screw 16 is turned inwardly to move the row of balls to press the lifting member 13 upwardly. IVhQn the ends of the ns- 18 are engaged by the shoulders 17a the ball ret-ainin member 11, 12 will be moved upwardly until the pins 19 engage the shoulders 20a at the upper ends of the grooves 20. The balls 15 will always be held in straight alignment above the stand@4 ard 10. When the jack is fully extended, with thelifting member entirely out ofthe standard 10, the balls will be held in alignment above the standard in the ball retaining member by the bars 12, 12, and also in the standard where they will lie in the bore 10b of such standard.` The walls of said standard surrounding the bore betweenv the holes 12a will serve to keep the balls in alignment even though the bars 12T are elevated.

The assembly. of the jack is very simple as the member 13 can be inserted through the collar 11 from the bottom and the shoe 14 then attached. The bars 12 can then be dropped in the standard from above by merelyl pressing in the pins 19 until they clear the s oulders 20a.

The construction and operation .of the modified form shown in Figs. 4, 5 and 6 are very much like the preferred form and consequently need not be described in particular. It will suffice to say thatin this form I provide two ball retaining members instead of one. Une ofthese is indicated by the collar 111 with the four depending bars 112 and the lother the collar 211 with four additional depending bars 212 alternating with the bars 112. Iii' this modified form the lifting niember is indicated by 113 andthe shoe by 114.

In the modifiedform shown in Figs. 4, 5 and 6, the collar 111 lies above the collar 211, the latter being provided with holes to accommodate the bars 112.

In the modified form the stops may be arranged in any 'suitable manner. Eor example, the lower end of the lifting member 113 may be provided withoan enlargement 75 adapted to engage the collar 111; and the lower ends of the bars 112 may be provided with pins 76 outwardl pressed byv Springs operating in grooves 7 iii the standard 10,

- such grooves'being continued part way into the collar 211 and terminating in shoulders 78. Likewise, the lower ends of the bars 212 may be provided with similar pins 79 operating in grooves 80 in the standard 110, v terminating at their upper'ends in shoulders 81.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in t e construction and arrangement may be made without de arting from the spirit and scope of the inventionv disclosed in the appended claims, in which it is my intention to claim all novelty in my invention as broadly as possible in view of the prior art.

What I claim is new, and desire to secure by Letters Patent, is:

1. A jack comprising, astandard having a f bore; aliftin'g member telescoping in said bore; a ball retainin member telescoping into said standard an having ball retaining bars surrounding said bore; a collar on the ball retaining member surrounding the lifting member; a ball receiving extension having a bore communicatin with the lower end of the bore in the-stan ard; a row of balls lying in said ball receiving extension; means for forcing said balls from said extension into the bore in the standard and against the lower end of the lifting member; and means for y. limitingthe upward movement of the lifting member through the collar on the ball retain.

l ing member.

2. A 'ack comprising; a standard having a `through the collar on the ball retaini ber, said means including inwardly projecting y bore; a lifting member telescoping in said bore; a plurality of ball retaining members telescoping into said standard, each having ball retaining bars surrounding said bore; a collar on eacli ball retaining member surrounding the lifting member, the ball retaining bars of one of said ball retaining members extending throughy the collar of the other ball retaining member; a ball receiving extension having a bore communicating with the lower end ofthe bore in the standard; a row of balls lying in said ball extension; means for forcing said balls from said extension into t-lie bore in the standard and against the lower end of the lifting member; means for limiting the upper movement of the lifting member through the collar in one of the ball retaining members; and means for limiting the upward movement of the ball retaining bars of one of said ball retaining members through the collar in the other ball retaining member.

3. A j ack comprising; a standard having a bore; a lifting member telescoping in said bore; a ball retaining member .telescoping into said standard and having ball retaining bars surrounding said bore; a collar on the ball retaining member surrounding thelifting member; a ball receiving extension having a bore communicating with the lower end of the bore in the standard; a row of balls lying in said ball receiving extension; means for forcing said balls from said extension into the bore in the standard and against the lower end of the lifting member; and means for limiting upward movement of the ball retaining member in the standard. v

4. A jack comprising; a standard having a bore; a lifting member telescoping in said..

the lifting member; and means for limiting the upward movement of the lifting memberv ins in the collar, the ends of said pins pro- ]ecting into slots in the lifting member, said slos terminating in shoulders at their lower en s.

5. A jack comprising; a standard having a bore; a lifting member' telescoping in said bore, a. ball retaining member telescoping into said standard and having ball retaining bars surrounding said bore; a collar on the ball retainin member surrounding the lifting member; a all receivinv extension having a bore communicating wit i the lower end ofthe bore -in the standard; a row of balls lying in said ball receiving extension;imeans for forcing said balls from said extension .into the bore in the standard and against the lower end of.

the lifting member; and means for limiting upward movement of the b-all retaining member in the standard, said means including outwardly. extending pins carried by the lower ends of the ball retaining bars, the ends of said pins projecting into grooves in the inner wall of the bore of the Standard, said grooves terminating in shoulders at their upper ends.' 6. A jac comprising; a. standard having a bore, a lifting member telescoping in said bore, a .ball retaining member telescoping into said standard and having ball retaining bars surrounding said bore; a collar on the ball retaining member surrounding the lifting member; a ball receivin extension having a borecommunicating witthe lower end of the bore in the standard; a row of balls lying in said ball receiving extension; means for forcing said balls from said extension'l into the bore in the standard and against the lower endl of the lifting member; and means for limiting upward movement of the ball retaning member\in the standard` said means lncluding outwardly extending spring pressed pins carried by the lower ends of the ball retaming bars, the ends of said pins proecting into grooves in the inner wall of the ore of the standard, said grooves terminating in shoulders at their upper ends.

7. A jack comprising; a standard having a bore; a ball receiving extension havin a bore communicating with the lower en of the bore in the standard; a. row of balls lying in said ball receiving extension; means for forcing said balls-from said extension into the bore in the standard; a lifting member telescoping in the bore in the standard; and a ball retaining member telesco ing into said standard and adapted to hol said balls in alignment therein when extended.

8. A jack comprising; a standard having a bore; a ball receiving extension havin a bore communicating with the lower endgof the bore in the standard; a row of balls lying in said ball receiving extension; means for forcing said balls from said extension into the bore in the standard, a lifting member telescoping in the bore in the standard; and a ball retaining member carrying the inner lifting member and telescoping in the standard, said ball retaining member adapted tov hold said balls in alignment when the lifting member and ball retaining member are extended. 9. A jack comprising; a standard having a bore; aI ball-receiving extension having a bore communicating with the lower end of the bore in the standard; a. row of balls lying in said ball receiving extension; means for forc- `ing said vballs from said extension into the bore in the standard; a'lifting member tele;

scoping 'in the bore in the standard; a ball retaining member carrying -the inner lifting .a.bore; a ball receiving extension having a bore communicating with the lower end of the bore in the standard; a. row of b-alls lying in said ball receiving extension; means for forcing said balls from said extension into the bore in the standard; a lifting member telescoping in the bore in the standard; and ball retaining means carrying the hfting member and permitting the same to be elevated completely out of the standard by upward pressure of the row of balls, said means operating to hold said balls in alignment above the end of the bore in the standard.

11. A jack comprising; a standard having a bore; a ball receiving extension having a bore communicating with the lower end of the bore in the standard; a row of balls lying in said ball receiving extension; means fo-r forcing said balls from said extension into.

the bore in the standard; a lifting member telescoping in the bore in the standard; and ball retaining means carrying the lifting `member and permitting the same to be elevated completely out of the standard by upward pressure of the row of balls, said means o erating to hold said balls in ahgnment above the end of the bore in the standard; and means for limiting the upward movement of the lifting memberY and 'the ball retaining means.

12. A-jack comprising; a standard having a bore; a ball receiving extensionhaving a bore eommunicatin wlth the lower end of the bore in the stan ard; a row of balls lying in said ball receiving extension; means for forcing said balls from said extension into the bore in the standard; a lifting membertelescoping in the bore in the standard; and ball retaining means carrying the lifting member and permitting the same to be elevated completely out of the standard by upward pres-` sure of the row of balls, said means operating to hold said balls in alignment above the end of the bore in the standard; and means for lll() limiting the upward movement of the lifting fp member.

13. A jack comprising; a standard having a bore; a ball receiving extension having a bore communicating with the lower end of the bore alignment when the ball retaining member is extended.

14. A jack comprising; a standard having a bore; a ball receiving extension having a bore communicating with the lower end of the bore in the standard; a row of balls in said ball receiving extension; means for forcing said row of balls from said extension into the bore in the standard; a lifting member telescoping in the bore in the standard and adapted to be elevated by said row of balls; and ball retaining means permitting the lifting member to be elevated completely out of the standard, said ball retaining means operating to hold the row of balls in straight alignment above the standard when the lifting member is so elevated. i

15. A jackconiprising; a standard having a bore; a ball receiving extension having a bore communicating with the lower end of the bore in the standard; a row of balls in Said ball receiving extension, means for forcing said row of balls from said extension into the bore in the standard; a 'lifting member telescoping in the bore in the standard and adapted to be elevated by said row of balls; ball retaining means permitting the lifting member to be elevated completely out of the standard, said ball retaining means opeiating to hold the row of balls in straight alignment above the standard when the lifting member is so elevated; and. means for limiting the elevation of the lifting member.

16. A jack comprising; a standard having a bore; a ball receivinflr extension-liaving abore communicating Wilil i the lower end of the n hold the row of balls 1n straight alignment above the standard when the lifting member is so elevated, said ball retaining means including a collar surroundinfr the lifting member with depending bars te eseoping into the standard.

17. A jack comprising; a standard having a bore; a ball receivinr extension having a bore communicating Witi the lower end of the bore in the standard; a row of balls in said ,y

ball receiving extension,l means for forcing said row of balls from said extension into the bore in the standard; a lifting member telescoping in the bore in the standard and adapted tobe elevated by said row of balls ball retaining means permitting the lifting niember to be elevated completely out of the standard, said ball retaining means operating to hold the row of balls in straight alignment above the standard when the lifting member is so elevated, said ball retaining means including a collar surroundinfr the lifting meinber with depending bars teleseoping into the standard; and means for limitingthe eleva-y tion of the liftingmember.

In witness whereof, I have hereunto set my hand this 1st day of Jul 1927.

. MAR US A. HIRSCHL. 

